Perhaps Evin was also feely antsy due to the imminent possibility of separation. He felt like separation was something far off in the future, so he was shocked to see it come to him so soon.
'How did it even come to this? Didn't we just come to the North to save my family from those mysterious attackers? At some point, the mysterious attackers turned to otherworlders and then we had to visit Lord Kena, hoping he'll be able to help us somehow… who suddenly offered a solution to split our soul…'
The past week was too much adventure; not just for his family, but to Evin as well. He felt tired, confused, and there was a constant weight of something on his mind.
The unnatural gray surrounding him did not help his mood either. He also felt the need to constantly look back, in case some people were following him from behind.
Evin needed something to distract himself.
<Even if we can separate, what kind of body are you going to inhibit?>